Question

Drag each characteristic or feature to the correct location on the diagram.

Answer 1

Answer:

Fish: gills in adult

Fish & Amphibians: extrenal fertilization

Amphibians: metamorphois

Fish & Reptiles: scales

Fish, Reptiles, & Amphibians: ectothermic, spinal cord

Reptiles & Amphibians: lungs in adult

Reptiles: amniotic eggs

Answer 2

Answer:

1. external fertilization : fish (exception of some sharks), amphibians
2. metamorphosis : insects, amphibians, echinoderms and starfish
3. spinal cord : all vertebrates
4. scales : reptiles, fish, mammals, birds
5. ectothermic : fish, amphibians, reptiles
6. amniotic eggs : birds, mammals, reptiles
7. gills in adults : fish
8. lungs in adults: mammals, birds, reptiles, amphibians

Explanation:

• External fertilization is fertilization i.e. fusion of egg and sperm outside the body of the female. This usually occurs in fish and amphibians.
• Metamorphosis refers to the developmental stages of insects, amphibians and echinoderms. It involves continuous change in shape or form during the life cycle.
• A spinal cord protected by the vertebral column is a feature of all vertebrates.
• Ectothermic animals are cold blooded i.e. they cannot regulate their body temperatures. Their body temperature changes with external changes.
• Amniotic eggs refer to eggs with a yolk or amniotic sac around the embryo. The amniotic sac protects the embryo. In the case of birds, it provides nutrients.